243639398 has 16 divisors (see below), whose sum is σ = 371292336. Its totient is φ = 119882880.

The previous prime is 243639373. The next prime is 243639401. The reversal of 243639398 is 893936342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74465 + ... + 77667.

It is an arithmetic number, because the mean of its divisors is an integer number (23205771).

Almost surely, 2^243639398 is an apocalyptic number.

243639398 is a deficient number, since it is larger than the sum of its proper divisors (127652938).

243639398 is a wasteful number, since it uses less digits than its factorization.

243639398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3799.

The product of its digits is 839808, while the sum is 47.

The square root of 243639398 is about 15608.9524952830. The cubic root of 243639398 is about 624.5719932566.

The spelling of 243639398 in words is "two hundred forty-three million, six hundred thirty-nine thousand, three hundred ninety-eight".